如何在 Github 操作中访问矩阵变量

Question

我已经为我的 CI 需求设置了一个 Github 工作流，每当我使用 matrix 值进行比较时，它似乎会以某种方式将分配给 matrix 变量的值重置为空字符串，例如

if: matrix.python-version == '3.8' && matrix.toxenv=='quality'

我已经指定 runs-on: ${{ matrix.os }} 它失败了：

评估作业“run_tests”的“runs-on”时出错。 （第 12 行，第 14 列）：意外值 ''

如果我指定runs-on: ubuntu-20.04，它就可以正常工作。

完整的 Github 工作流程： （我设置了 TOXENV 环境变量，因此它为每个 tox 环境并行运行一个新作业，并避免在每个作业中运行不必要的构建（例如质量）并减慢作业速度）

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  run_tests:
    name: Tests
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-20.04]
        python-version: ['3.5', '3.8', '3.9']
        toxenv: ['django22', 'django30','django31']
        include:
          - python-version: "3.8"
            toxenv: "quality"
        exclude:
          - python-version: "3.5"
            toxenv: "django30"
          - python-version: "3.5"
            toxenv: "django31"

    steps:
    - uses: actions/checkout@v2
    - name: setup python
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python-version }}

    - name: Install pip
      run: pip install -r requirements/pip.txt

    - name: Install Dependencies
      run: pip install -r requirements/ci.txt

    - name: Run Tests
      env:
        TOXENV: python${{ matrix.python-version }}-${{ matrix.toxenv }}
      run: tox

    # it'll run a separate job for quality checks with python 3.8
    - name: Run Quality
      if: matrix.python-version == '3.8' && matrix.toxenv=='quality'
      env:
        TOXENV: ${{ matrix.toxenv }}
      run: tox

    - name: Run Coverage
      if: matrix.python-version == '3.8' && matrix.toxenv=='django22'
      uses: codecov/codecov-action@v1
      with:
        flags: unittests
        fail_ci_if_error: true

Answer 1

此问题与您的 include 部分有关。我不知道为什么，但在这里您必须完全定义要添加另一个配置的组合。这种语法可以工作：

jobs:
  run_tests:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-20.04]
        python-version: ['3.5', '3.8', '3.9']
        toxenv: ['django22', 'django30','django31']
        include:
          - python-version: '3.8'
            toxenv: 'quality'
            os: [ubuntu-20.04]
        exclude:
          - python-version: '3.5'
            toxenv: 'django30'
          - python-version: '3.5'
            toxenv: 'django31'
    steps:
    - name: Get color
      run: echo "${{ matrix.os }} - ${{ matrix.python-version }} - ${{ matrix.toxenv }}"